CPSC 457 OPERATING SYSTEMS MIDTERM EXAM
|
|
- Kelley Harmon
- 5 years ago
- Views:
Transcription
1 CPSC 457 OPERATING SYSTEMS MIDTERM EXAM Department of Computer Science University of Calgary Professor: Carey Williamson March 9, 2010 This is a CLOSED BOOK exam. Textbooks, notes, laptops, calculators, personal digital assistants, cell phones, and Internet access are NOT allowed. It is a 75 minute exam, with a total of 60 marks. There are 11 questions, and 9 pages (including this cover page). Please read each question carefully, and write your answers legibly in the space provided. You may do the questions in any order you wish, but please USE YOUR TIME WISELY. When you are finished, please hand in your exam paper and sign out. Good luck! Student Name: Student ID: Score: / 60 = % 1
2 Multiple Choice Choose the best answer for each of the following 6 questions, for a total of 6 marks Three important design principles in operating systems are: (a) caching, virtualization, and support for concurrency (b) abstraction, fairness, and context-switching (c) throughput, response time, and support for priority (d) parallelism, concurrency, and multi-anything (e) policy, mechanism, and superuser control (f) all of the above 1 2. Changing the permissions on your files is easy in Linux because: (a) there is a built-in command-line utility for doing so (b) there is a C programming library routine for doing so (c) there is a shell program for doing so (d) there is a Java program for doing so (e) there is a superuser on call for doing so (f) all of the above 1 3. In message-passing IPC on a Linux system, the maximum message size permitted is: (a) 1 byte (b) 4 bytes (c) 32 bytes (d) 64 bytes (e) 140 bytes (f) none of the above 2
3 1 4. When a process is created using the classical fork() system call, which of the following is not inherited by the child process? (a) process address space (b) process ID (c) user ID (d) open files (e) signal handlers (f) none of the above 1 5. The text segment of a process address space contains: (a) the statically allocated data associated with the process (b) the dynamically allocated data associated with the process (c) the executable code associated with the process (d) the inter-process communication (IPC) messages for the process (e) the text-messaging chat messages for the process (f) all of the above 1 6. The threading model supported by the Linux operating system is: (a) many-to-one (b) one-to-one (c) one-to-many (d) many-to-many (e) all of the above (f) none of the above 3
4 Operating System Principles In class, we have illustrated operating system principles using examples from former and current operating systems, including Multics, Unix, Linux, Windows, and Mac OS. (a) (2 marks) What is an Operating System (OS)? (b) (5 marks) List and briefly describe any 5 of the typical services provided by an OS. (c) (3 marks) Most operating system functionality can be provided using a variety of mechanisms, including system calls, built-in commands, and user-level programming support. Give 3 examples, from either Linux, MacOS, or Windows, of useful operating system functionality, indicating clearly the mechanism by which the service is provided. 4
5 Operating System Concepts and Definitions For each of the following pairs of terms, define each term, making sure to clarify the key difference(s) between the two terms. (a) (2 marks) process and processor (b) (2 marks) fork() and exec() (c) (2 marks) signal and pipe (d) (2 marks) C program and shell program (e) (2 marks) pre-emptive and non-preemptive (f) (2 marks) CPU-bound and I/O-bound 5
6 Processes and Threads Most modern operating systems provide support for both processes and threads. (a) (2 marks) What is a process? (b) (2 marks) What is a thread? (c) (3 marks) List any 6 of the attributes that an operating system maintains to keep track of information about a process. (d) (3 marks) List the 3 most important attributes that an operating system maintains to keep track of information about a thread. (e) (2 marks) List 2 reasons why the scheduling of processes and threads on a multiprocessor system is more complicated than scheduling them on a uni-processor system. 6
7 CPU Scheduling Consider the following set of jobs to be scheduled for execution on a single CPU system. Job Arrival Time Size (msec) Priority J (Silver) J (Gold) J (Bronze) J (Silver) J (Bronze) J (Gold) (a) (2 marks) Draw a Gantt chart showing FCFS scheduling for these jobs. (b) (2 marks) Draw a Gantt chart showing (non-preemptive) SJF scheduling. (c) (2 marks) Draw a Gantt chart showing non-preemptive PRIORITY scheduling. (d) (2 marks) Draw a Gantt chart showing preemptive PRIORITY scheduling. (e) (2 marks) Which of the foregoing scheduling policies provides the lowest waiting time for this set of jobs? What is the waiting time with this policy? (Show your work) 7
8 Operating System Utilities The output on the next page is from a lightly-used Linux system on the recent weekend. Use the output and your knowledge of Linux systems to answer the following questions: (a) (1 mark) On what date (approximately) was this system most recently rebooted? (b) (1 mark) How many distinct users are logged in on this sytem? (c) (1 mark) Approximately how many processes are currently present on this system? (d) (1 mark) How much physical memory (RAM) does this particular Linux system have? (e) (1 mark) What percentage (approximately) of the memory is currently in use? (f) (1 mark) Which process (PID or name) has consumed the most CPU time so far? (g) (1 mark) Which process (PID or name) is currently consuming the most memory? (h) (1 mark) Which process (PID or name) is the oldest process on this system? (i) (1 mark) Which process (PID or name) has created the most child processes? (j) (1 mark) What is your professor s favourite editor? 8
9 w 09:11:09 up 184 days, 17:43, 3 users, load average: 0.52, 0.37, 0.35 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT carey pts/5 csg 06: s 0.47s 0.00s w carey pts/6 ict736a Thu09 19:41m 0.04s 0.04s -csh jess pts/8 ict624 08:16 31:25m 0.02s 0.06s -bash [carey@csl]$ ps PID TTY TIME CMD 1179 pts/5 00:00:00 csh 1407 pts/5 00:00:00 emacs-x 3721 pts/5 00:00:00 sleep 3740 pts/5 00:01:00./fractal 3748 pts/5 00:00:00 ps [carey@csl]$ ps -l F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 0 S rt_sig pts/5 00:00:00 csh 0 T finish pts/5 00:00:00 emacs-x 0 S pts/5 00:00:00 sleep 0 R pts/5 00:00:00 ps 0 R pts/5 00:01:00./fractal [carey@csl]$ top top - 09:11:25 up 184 days, 17:58, 3 users, load average: 0.26, 0.34, 0.34 Tasks: 179 total, 2 running, 141 sleeping, 36 stopped, 0 zombie Cpu(s): 2.5%us, 5.6%sy, 0.0%ni, 91.9%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0% Mem: k total, k used, k free, k buffers Swap: k total, 54544k used, k free, k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND cristo R :13.56 linux 3567 carey T :00.24 top 1407 carey S :00.18 emacs-x 3740 carey S :01.00./fractal 3721 carey S :00.04 sleep 1 root S :41.56 init 2 root RT S :07.75 migration/0 3 root S :07.17 ksoftirqd/0 4 root RT S :00.00 watchdog/0 *** THE END *** 9
CPSC 457 OPERATING SYSTEMS MIDTERM EXAM SOLUTION
CPSC 457 OPERATING SYSTEMS MIDTERM EXAM SOLUTION Department of Computer Science University of Calgary Professor: Carey Williamson October 29, 2008 This is a CLOSED BOOK exam. Textbooks, notes, laptops,
More informationHigh Performance Computing Lecture 11. Matthew Jacob Indian Institute of Science
High Performance Computing Lecture 11 Matthew Jacob Indian Institute of Science Agenda 1. Program execution: Compilation, Object files, Function call and return, Address space, Data & its representation
More informationCPSC 457 OPERATING SYSTEMS FINAL EXAM
CPSC 457 OPERATING SYSTEMS FINAL EXAM Department of Computer Science University of Calgary Professor: Carey Williamson April 21, 2010 This is a CLOSED BOOK exam. Textbooks, notes, laptops, calculators,
More informationCPSC 457 OPERATING SYSTEMS SAMPLE FINAL EXAM
CPSC 457 OPERATING SYSTEMS SAMPLE FINAL EXAM Department of Computer Science University of Calgary Professor: Carey Williamson December 10, 2008 This is a CLOSED BOOK exam. Textbooks, notes, laptops, calculators,
More informationLinux System Administration
System Processes Objective At the conclusion of this module, the student will be able to: Describe and define a process Identify a process ID, the parent process and the child process Learn the PID for
More informationUnix Processes. What is a Process?
Unix Processes Process -- program in execution shell spawns a process for each command and terminates it when the command completes Many processes all multiplexed to a single processor (or a small number
More informationChecking Resource Usage in Fedora (Linux)
Lab 5C Checking Resource Usage in Fedora (Linux) Objective In this exercise, the student will learn how to check the resources on a Fedora system. This lab covers the following commands: df du top Equipment
More informationCSE473/Spring st Midterm Exam Tuesday, February 19, 2007 Professor Trent Jaeger
CSE473/Spring 2008-1st Midterm Exam Tuesday, February 19, 2007 Professor Trent Jaeger Please read the instructions and questions carefully. You will be graded for clarity and correctness. You have 75 minutes
More informationCPSC 457 OPERATING SYSTEMS FINAL EXAM
CPSC 457 OPERATING SYSTEMS FINAL EXAM Department of Computer Science University of Calgary Professor: Carey Williamson December 10, 2008 This is a CLOSED BOOK exam. Textbooks, notes, laptops, calculators,
More informationManaging Processes Process: A running program
Managing Processes Process: A running program User Process: The process initiated by a User while logged into a terminal (e.g. grep, find, ls) Daemon Process: These processes are usually initiated on system
More informationSperimentazioni I LINUX commands tutorial - Part II
Sperimentazioni I LINUX commands tutorial - Part II A. Garfagnini, M. Mazzocco Università degli studi di Padova 24 Ottobre 2012 Streams and I/O Redirection Pipelines Create, monitor and kill processes
More informationMost of the work is done in the context of the process rather than handled separately by the kernel
Process Control Process Abstraction for a running program Manages program s use of memory, cpu time, and i/o resources Most of the work is done in the context of the process rather than handled separately
More informationCPSC 441 COMPUTER NETWORKS MIDTERM EXAM
CPSC 441 COMPUTER NETWORKS MIDTERM EXAM Department of Computer Science University of Calgary Professor: Carey Williamson March 7, 2018 This is a CLOSED BOOK exam. Textbooks, notes, laptops, personal digital
More informationCPSC 441 COMPUTER COMMUNICATIONS MIDTERM EXAM SOLUTION
CPSC 441 COMPUTER COMMUNICATIONS MIDTERM EXAM SOLUTION Department of Computer Science University of Calgary Professor: Carey Williamson March 2, 2012 This is a CLOSED BOOK exam. Textbooks, notes, laptops,
More informationBooting Up & Processes
CS 326: Operating Systems Booting Up & Processes Lecture 3 Today s Schedule Booting the System Process Structure Process Execution The Init System fork() wait() 1/31/18 CS 326: Operating Systems 2 Today
More informationOperating Systems Comprehensive Exam. Spring Student ID # 3/16/2006
Operating Systems Comprehensive Exam Spring 2006 Student ID # 3/16/2006 You must complete all of part I (60%) You must complete two of the three sections in part II (20% each) In Part I, circle or select
More informationCPSC 441 COMPUTER COMMUNICATIONS MIDTERM EXAM
CPSC 441 COMPUTER COMMUNICATIONS MIDTERM EXAM Department of Computer Science University of Calgary Professor: Carey Williamson November 1, 2005 This is a CLOSED BOOK exam. Textbooks, notes, laptops, personal
More informationB. V. Patel Institute of Business Management, Computer &Information Technology, UTU
BCA-3 rd Semester 030010304-Fundamentals Of Operating Systems Unit: 1 Introduction Short Answer Questions : 1. State two ways of process communication. 2. State any two uses of operating system according
More information(MCQZ-CS604 Operating Systems)
command to resume the execution of a suspended job in the foreground fg (Page 68) bg jobs kill commands in Linux is used to copy file is cp (Page 30) mv mkdir The process id returned to the child process
More informationChapter 9: Process management. Chapter 9 Process management
Chapter 9: Process management Chapter 9 Process management Last revised: 19/7/2004 Chapter 9 Outline In this chapter we will learn about: Processes and process concepts Examining processes Adjusting process
More informationSubject: Operating System (BTCOC403) Class: S.Y.B.Tech. (Computer Engineering)
A. Multiple Choice Questions (60 questions) Subject: Operating System (BTCOC403) Class: S.Y.B.Tech. (Computer Engineering) Unit-I 1. What is operating system? a) collection of programs that manages hardware
More informationTDIU25: Operating Systems II. Processes, Threads and Scheduling
TDIU25: Operating Systems II. Processes, Threads and Scheduling SGG9: 3.1-3.3, 4.1-4.3, 5.1-5.4 o Process concept: context switch, scheduling queues, creation o Multithreaded programming o Process scheduling
More informationProblem Set: Processes
Lecture Notes on Operating Systems Problem Set: Processes 1. Answer yes/no, and provide a brief explanation. (a) Can two processes be concurrently executing the same program executable? (b) Can two running
More informationOperating Systems Comprehensive Exam. Spring Student ID # 3/20/2013
Operating Systems Comprehensive Exam Spring 2013 Student ID # 3/20/2013 You must complete all of Section I You must complete two of the problems in Section II If you need more space to answer a question,
More informationSAMPLE MIDTERM QUESTIONS
SAMPLE MIDTERM QUESTIONS CS 143A Notes: 1. These questions are just for you to have some questions to practice. 2. There is no guarantee that there will be any similarities between these questions and
More information( B ) 4. Which is not able to solve the race condition? (A) Test and Set Lock (B) Shared memory (C) Semaphore (D) Monitor
CS 540 - Operating Systems - Final Exam - Name: Date: Monday, May 12, 2003 Part 1: (80 + 8 (bonus) points - 4 points for each problem) ( C ) 1. In an operating system a utility which reads commands from
More informationCMPSCI 377: Operating Systems Exam 1: Processes, Threads, CPU Scheduling and Synchronization. October 9, 2002
Name: Student Id: General instructions: CMPSCI 377: Operating Systems Exam 1: Processes, Threads, CPU Scheduling and Synchronization October 9, 2002 This examination booklet has 10 pages. Do not forget
More informationENGR 3950U / CSCI 3020U Midterm Exam SOLUTIONS, Fall 2012 SOLUTIONS
SOLUTIONS ENGR 3950U / CSCI 3020U (Operating Systems) Midterm Exam October 23, 2012, Duration: 80 Minutes (10 pages, 12 questions, 100 Marks) Instructor: Dr. Kamran Sartipi Question 1 (Computer Systgem)
More informationALL the assignments (A1, A2, A3) and Projects (P0, P1, P2) we have done so far.
Midterm Exam Reviews ALL the assignments (A1, A2, A3) and Projects (P0, P1, P2) we have done so far. Particular attentions on the following: System call, system kernel Thread/process, thread vs process
More informationAPACHE TROUBLESHOOTING. Or, what to do when your vhost won t behave
APACHE TROUBLESHOOTING Or, what to do when your vhost won t behave ABOUT THE CLASS 24 hours over three days Very Short Lecture and Lots of Labs Hours: 8:30am - 5:00pm Lunch: 11:45am - 1:00pm ABOUT THE
More informationCPSC 341 OS & Networks. Processes. Dr. Yingwu Zhu
CPSC 341 OS & Networks Processes Dr. Yingwu Zhu Process Concept Process a program in execution What is not a process? -- program on a disk A process is an active object, but a program is just a file It
More informationCSC Operating Systems Spring Lecture - XII Midterm Review. Tevfik Ko!ar. Louisiana State University. March 4 th, 2008.
CSC 4103 - Operating Systems Spring 2008 Lecture - XII Midterm Review Tevfik Ko!ar Louisiana State University March 4 th, 2008 1 I/O Structure After I/O starts, control returns to user program only upon
More informationEECE.4810/EECE.5730: Operating Systems Spring Midterm Exam March 8, Name: Section: EECE.4810 (undergraduate) EECE.
EECE.4810/EECE.5730: Operating Systems Spring 2017 Midterm Exam March 8, 2017 Name: Section: EECE.4810 (undergraduate) EECE.5730 (graduate) For this exam, you may use two 8.5 x 11 double-sided page of
More informationCS370 Operating Systems Midterm Review
CS370 Operating Systems Midterm Review Yashwant K Malaiya Fall 2015 Slides based on Text by Silberschatz, Galvin, Gagne 1 1 What is an Operating System? An OS is a program that acts an intermediary between
More informationCHAPTER 2: PROCESS MANAGEMENT
1 CHAPTER 2: PROCESS MANAGEMENT Slides by: Ms. Shree Jaswal TOPICS TO BE COVERED Process description: Process, Process States, Process Control Block (PCB), Threads, Thread management. Process Scheduling:
More informationS E C T I O N O V E R V I E W
INPUT, OUTPUT REDIRECTION, PIPING AND PROCESS CONTROL S E C T I O N O V E R V I E W In this section, we will learn about: input redirection; output redirection; piping; process control; 5.1 INPUT AND OUTPUT
More informationMidterm Exam. October 20th, Thursday NSC
CSE 421/521 - Operating Systems Fall 2011 Lecture - XIV Midterm Review Tevfik Koşar University at Buffalo October 18 th, 2011 1 Midterm Exam October 20th, Thursday 9:30am-10:50am @215 NSC Chapters included
More informationPROCESSES. Jo, Heeseung
PROCESSES Jo, Heeseung TODAY'S TOPICS What is the process? How to implement processes? Inter-Process Communication (IPC) 2 WHAT IS THE PROCESS? Program? vs. Process? vs. Processor? 3 PROCESS CONCEPT (1)
More informationProcesses. Jo, Heeseung
Processes Jo, Heeseung Today's Topics What is the process? How to implement processes? Inter-Process Communication (IPC) 2 What Is The Process? Program? vs. Process? vs. Processor? 3 Process Concept (1)
More informationChapter 3: Process Concept
Chapter 3: Process Concept Chapter 3: Process Concept Process Concept Process Scheduling Operations on Processes Inter-Process Communication (IPC) Communication in Client-Server Systems Objectives 3.2
More informationChapter 3: Process Concept
Chapter 3: Process Concept Chapter 3: Process Concept Process Concept Process Scheduling Operations on Processes Inter-Process Communication (IPC) Communication in Client-Server Systems Objectives 3.2
More informationComp 310 Computer Systems and Organization
Comp 310 Computer Systems and Organization Lecture #9 Process Management (CPU Scheduling) 1 Prof. Joseph Vybihal Announcements Oct 16 Midterm exam (in class) In class review Oct 14 (½ class review) Ass#2
More informationLecture 17: Threads and Scheduling. Thursday, 05 Nov 2009
CS211: Programming and Operating Systems Lecture 17: Threads and Scheduling Thursday, 05 Nov 2009 CS211 Lecture 17: Threads and Scheduling 1/22 Today 1 Introduction to threads Advantages of threads 2 User
More informationOperating Systems Comprehensive Exam. Fall Student ID # 10/31/2013
Operating Systems Comprehensive Exam Fall 2013 Student ID # 10/31/2013 You must complete all of Section I You must complete two of the problems in Section II If you need more space to answer a question,
More informationSystems Programming/ C and UNIX
Systems Programming/ C and UNIX Alice E. Fischer Lecture 6: Processes October 9, 2017 Alice E. FischerLecture 6: Processes Lecture 5: Processes... 1/26 October 9, 2017 1 / 26 Outline 1 Processes 2 Process
More informationOperating Systems. Figure: Process States. 1 P a g e
1. THE PROCESS CONCEPT A. The Process: A process is a program in execution. A process is more than the program code, which is sometimes known as the text section. It also includes the current activity,
More information( D ) 4. Which is not able to solve the race condition? (A) Test and Set Lock (B) Semaphore (C) Monitor (D) Shared memory
CS 540 - Operating Systems - Final Exam - Name: Date: Wenesday, May 12, 2004 Part 1: (78 points - 3 points for each problem) ( C ) 1. In UNIX a utility which reads commands from a terminal is called: (A)
More informationChapter 3: Processes. Operating System Concepts 9 th Edit9on
Chapter 3: Processes Operating System Concepts 9 th Edit9on Silberschatz, Galvin and Gagne 2013 Chapter 3: Processes 1. Process Concept 2. Process Scheduling 3. Operations on Processes 4. Interprocess
More informationChapter 3: Processes
Chapter 3: Processes Silberschatz, Galvin and Gagne 2013 Chapter 3: Processes Process Concept Process Scheduling Operations on Processes Interprocess Communication 3.2 Silberschatz, Galvin and Gagne 2013
More informationCS Operating system Fall Midterm I -- Oct 5, 2017 You have 75 min. Good Luck!
Name / ID (please PRINT) Seq#: Seat #: CS 3733.001 -- Operating system Fall 2017 -- Midterm I -- Oct 5, 2017 You have 75 min. Good Luck! This is a closed book/note examination. But You can use C reference
More informationPROCESS MANAGEMENT. Operating Systems 2015 Spring by Euiseong Seo
PROCESS MANAGEMENT Operating Systems 2015 Spring by Euiseong Seo Today s Topics Process Concept Process Scheduling Operations on Processes Interprocess Communication Examples of IPC Systems Communication
More informationCHAPTER NO - 1 : Introduction:
Sr. No L.J. Institute of Engineering & Technology Semester: IV (26) Subject Name: Operating System Subject Code:21402 Faculties: Prof. Saurin Dave CHAPTER NO - 1 : Introduction: TOPIC:1 Basics of Operating
More informationCPSC 441 COMPUTER COMMUNICATIONS MIDTERM EXAM SOLUTION
CPSC 441 COMPUTER COMMUNICATIONS MIDTERM EXAM SOLUTION Department of Computer Science University of Calgary Professor: Carey Williamson March 8, 2013 This is a CLOSED BOOK exam. Textbooks, notes, laptops,
More informationMYSQL TROUBLESHOOTING. Or, what to do when MySQL starts throwing a fit
MYSQL TROUBLESHOOTING Or, what to do when MySQL starts throwing a fit ABOUT THE CLASS 24 hours over three days Very Short Lecture and Lots of Labs Hours: 8:30am - 5:00pm Lunch: 11:45am - 1:00pm ABOUT THE
More informationProcesses COMPSCI 386
Processes COMPSCI 386 Elements of a Process A process is a program in execution. Distinct processes may be created from the same program, but they are separate execution sequences. call stack heap STACK
More informationChap 4, 5: Process. Dongkun Shin, SKKU
Chap 4, 5: Process 1 Process Concept Job A bundle of program and data to be executed An entity before submission for execution Process (= running program) An entity that is registered to kernel for execution
More informationProcess Description and Control
Process Description and Control B.Ramamurthy 1/28/02 B.Ramamurthy 1 Introduction The fundamental task of any operating system is process management. OS must allocate resources to processes, enable sharing
More informationIntroduction to Operating Systems Prof. Chester Rebeiro Department of Computer Science and Engineering Indian Institute of Technology, Madras
Introduction to Operating Systems Prof. Chester Rebeiro Department of Computer Science and Engineering Indian Institute of Technology, Madras Week 05 Lecture 18 CPU Scheduling Hello. In this lecture, we
More informationAgenda Process Concept Process Scheduling Operations on Processes Interprocess Communication 3.2
Lecture 3: Processes Agenda Process Concept Process Scheduling Operations on Processes Interprocess Communication 3.2 Process in General 3.3 Process Concept Process is an active program in execution; process
More informationCS 3733 Operating Systems
What will be covered in MidtermI? CS 3733 Operating Systems Instructor: Dr. Tongping Liu Department Computer Science The University of Texas at San Antonio Basics of C programming language Processes, program
More informationMid Term from Feb-2005 to Nov 2012 CS604- Operating System
Mid Term from Feb-2005 to Nov 2012 CS604- Operating System Latest Solved from Mid term Papers Resource Person Hina 1-The problem with priority scheduling algorithm is. Deadlock Starvation (Page# 84) Aging
More informationLecture 2 Process Management
Lecture 2 Process Management Process Concept An operating system executes a variety of programs: Batch system jobs Time-shared systems user programs or tasks The terms job and process may be interchangeable
More informationCS630 Operating System Design, First Exam, Spring 2017,
First Exam, Spring 2017, Problem 1. (35 Points) Assume that P A, P B and P C are three distinctive programs. When P A is executed, it forks new processes executing P B at tick-marks 2, 5 and 7 and its
More informationChapter 3: Process Concept
Chapter 3: Process Concept Silberschatz, Galvin and Gagne 2013! Chapter 3: Process Concept Process Concept" Process Scheduling" Operations on Processes" Inter-Process Communication (IPC)" Communication
More informationCS 370 Operating Systems
NAME S.ID. # CS 370 Operating Systems Mid-term Example Instructions: The exam time is 50 minutes. CLOSED BOOK. 1. [24 pts] Multiple choice. Check one. a. Multiprogramming is: An executable program that
More informationECE 550D Fundamentals of Computer Systems and Engineering. Fall 2017
ECE 550D Fundamentals of Computer Systems and Engineering Fall 2017 The Operating System (OS) Prof. John Board Duke University Slides are derived from work by Profs. Tyler Bletsch and Andrew Hilton (Duke)
More informationOS Assignment II. The process of executing multiple threads simultaneously is known as multithreading.
OS Assignment II 1. A. Provide two programming examples of multithreading giving improved performance over a single-threaded solution. The process of executing multiple threads simultaneously is known
More informationProblem Set: Processes
Lecture Notes on Operating Systems Problem Set: Processes 1. Answer yes/no, and provide a brief explanation. (a) Can two processes be concurrently executing the same program executable? (b) Can two running
More informationProcesses. Jin-Soo Kim Computer Systems Laboratory Sungkyunkwan University
Processes Jin-Soo Kim (jinsookim@skku.edu) Computer Systems Laboratory Sungkyunkwan University http://csl.skku.edu OS Internals User space shell ls trap shell ps Kernel space File System Management I/O
More informationOPERATING SYSTEMS. UNIT II Sections A, B & D. An operating system executes a variety of programs:
OPERATING SYSTEMS UNIT II Sections A, B & D PREPARED BY ANIL KUMAR PRATHIPATI, ASST. PROF., DEPARTMENT OF CSE. PROCESS CONCEPT An operating system executes a variety of programs: Batch system jobs Time-shared
More informationOPERATING SYSTEMS: Lesson 4: Process Scheduling
OPERATING SYSTEMS: Lesson 4: Process Scheduling Jesús Carretero Pérez David Expósito Singh José Daniel García Sánchez Francisco Javier García Blas Florin Isaila 1 Content Process creation. Process termination.
More informationCRUK cluster practical sessions (SLURM) Part I processes & scripts
CRUK cluster practical sessions (SLURM) Part I processes & scripts login Log in to the head node, clust1-headnode, using ssh and your usual user name & password. SSH Secure Shell 3.2.9 (Build 283) Copyright
More informationMARUTHI SCHOOL OF BANKING (MSB)
MARUTHI SCHOOL OF BANKING (MSB) SO IT - OPERATING SYSTEM(2017) 1. is mainly responsible for allocating the resources as per process requirement? 1.RAM 2.Compiler 3.Operating Systems 4.Software 2.Which
More informationOperating Systems Comprehensive Exam. Spring Student ID # 2/17/2011
Operating Systems Comprehensive Exam Spring 2011 Student ID # 2/17/2011 You must complete all of Section I You must complete two of the problems in Section II If you need more space to answer a question,
More informationCPU Scheduling: Part I ( 5, SGG) Operating Systems. Autumn CS4023
Operating Systems Autumn 2017-2018 Outline 1 CPU Scheduling: Part I ( 5, SGG) Outline CPU Scheduling: Part I ( 5, SGG) 1 CPU Scheduling: Part I ( 5, SGG) Basic Concepts Typical program behaviour CPU Scheduling:
More informationCPS 110 Midterm. Spring 2011
CPS 110 Midterm Spring 2011 Ola! Greetings from Puerto Rico, where the air is warm and salty and the mojitos are cold and sweet. Please answer all questions for a total of 200 points. Keep it clear and
More informationUser Commands ps ( 1 )
NAME ps report process status SYNOPSIS ps [-aacdefjllpy] [-g grplist] [-n namelist] [-o format]... [-p proclist] [-s sidlist] [-t term] [-u uidlist] [-U uidlist] [-G gidlist] DESCRIPTION The ps command
More information2/14/2012. Using a layered approach, the operating system is divided into N levels or layers. Also view as a stack of services
Rensselaer Polytechnic Institute CSC 432 Operating Systems David Goldschmidt, Ph.D. Using a layered approach, the operating system is divided into N levels or layers Layer 0 is the hardware Layer 1 is
More informationOperating System(16MCA24)
PESIT- Bangalore South Campus Hosur Road (1km Before Electronic city) Bangalore 560 100 Department of MCA COURSE INFORMATION SHEET Operating System(16MCA24) 1. GENERAL INFORMATION Academic Year: 2017 Semester(s):I
More informationCPS 310 first midterm exam, 2/26/2014
CPS 310 first midterm exam, 2/26/2014 Your name please: Part 1. More fun with forks (a) What is the output generated by this program? In fact the output is not uniquely defined, i.e., it is not necessarily
More informationProcesses. Process Scheduling, Process Synchronization, and Deadlock will be discussed further in Chapters 5, 6, and 7, respectively.
Processes Process Scheduling, Process Synchronization, and Deadlock will be discussed further in Chapters 5, 6, and 7, respectively. 1. Process Concept 1.1 What is a Process? A process is a program in
More informationOPERATING SYSTEMS CS3502 Spring Processor Scheduling. Chapter 5
OPERATING SYSTEMS CS3502 Spring 2018 Processor Scheduling Chapter 5 Goals of Processor Scheduling Scheduling is the sharing of the CPU among the processes in the ready queue The critical activities are:
More informationProcess Time. Steven M. Bellovin January 25,
Multiprogramming Computers don t really run multiple programs simultaneously; it just appears that way Each process runs to completion, but intermixed with other processes Process 1 6 ticks Process 2 Process
More informationProcesses. System tasks Campus-Booster ID : **XXXXX. Copyright SUPINFO. All rights reserved
Processes System tasks Campus-Booster ID : **XXXXX www.supinfo.com Copyright SUPINFO. All rights reserved Processes Your trainer Presenter s Name Title: **Enter title or job role. Accomplishments: **What
More informationMidterm Exam Solutions Amy Murphy 28 February 2001
University of Rochester Midterm Exam Solutions Amy Murphy 8 February 00 Computer Systems (CSC/56) Read before beginning: Please write clearly. Illegible answers cannot be graded. Be sure to identify all
More informationTechno India Batanagar Department of Computer Science & Engineering. Model Questions. Multiple Choice Questions:
Techno India Batanagar Department of Computer Science & Engineering Model Questions Subject Name: Operating System Multiple Choice Questions: Subject Code: CS603 1) Shell is the exclusive feature of a)
More informationOperating Systems. Lecture 05
Operating Systems Lecture 05 http://web.uettaxila.edu.pk/cms/sp2013/seosbs/ February 25, 2013 Process Scheduling, System Calls Execution (Fork,Wait,Exit,Exec), Inter- Process Communication Schedulers Long
More informationKEY CENG 334. Midterm. Question 1. Question 2. Question 3. Question 4. Question 5. Question 6. Total. Name, SURNAME and ID
00 11 00 11 01 01 01 01 01 01 00 11 00 11 Name, SURNAME and ID Middle East Technical University Department of Computer Engineering KEY CENG 334 Section 2 and 3 Spring 2010-2011 Midterm Duration: 120 minutes.
More informationProcess. Heechul Yun. Disclaimer: some slides are adopted from the book authors slides with permission 1
Process Heechul Yun Disclaimer: some slides are adopted from the book authors slides with permission 1 Recap OS services Resource (CPU, memory) allocation, filesystem, communication, protection, security,
More informationOPERATING SYSTEMS. After A.S.Tanenbaum, Modern Operating Systems, 3rd edition. Uses content with permission from Assoc. Prof. Florin Fortis, PhD
OPERATING SYSTEMS #5 After A.S.Tanenbaum, Modern Operating Systems, 3rd edition Uses content with permission from Assoc. Prof. Florin Fortis, PhD General information GENERAL INFORMATION Cooperating processes
More informationCourse Contents/Syllabus: Weightage (%) Module I: Introduction to operating system: 15
U T T A R P R A D E S H Course Title: Operating Systems Credit Units: 04 Course Level: UG Course Code: CSE202 L T P/ S SW/F W TOTAL CREDIT UNITS 2 1 2 0 4 Course Objectives: After successfully completing
More informationOperating Systems. Review ENCE 360
Operating Systems Review ENCE 360 High level Concepts What are three conceptual pieces fundamental to operating systems? High level Concepts What are three conceptual pieces fundamental to operating systems?
More informationProcesses and Non-Preemptive Scheduling. Otto J. Anshus
Processes and Non-Preemptive Scheduling Otto J. Anshus Threads Processes Processes Kernel An aside on concurrency Timing and sequence of events are key concurrency issues We will study classical OS concurrency
More informationYork University Lassonde School of Engineering Department of Electrical Engineering and Computer Science
York University Lassonde School of Engineering Department of Electrical Engineering and Computer Science Midterm EECS 3221.03Z Operating Systems Fundamentals Feb 26, 2015 (14:30-16:00) Section: EECS3221Z
More informationLinux Operating System
Linux Operating System Dept. of Computer Science & Engineering 1 History Linux is a modern, free operating system based on UNIX standards. First developed as a small but self-contained kernel in 1991 by
More informationCPS 310 first midterm exam, 10/6/2014
CPS 310 first midterm exam, 10/6/2014 Your name please: Part 1. More fun with fork and exec* What is the output generated by this program? Please assume that each executed print statement completes, e.g.,
More informationChapter 6: CPU Scheduling. Operating System Concepts 9 th Edition
Chapter 6: CPU Scheduling Silberschatz, Galvin and Gagne 2013 Chapter 6: CPU Scheduling Basic Concepts Scheduling Criteria Scheduling Algorithms Thread Scheduling Multiple-Processor Scheduling Real-Time
More informationMySQL Performance Troubleshooting
MySQL Performance Troubleshooting Best Practices Francisco Bordenave - Architect, Percona Agenda Who am I? Introduction Identifying the source of problem We know where the problem is, now what? Best practices
More informationAppendix A GLOSSARY. SYS-ED/ Computer Education Techniques, Inc.
Appendix A GLOSSARY SYS-ED/ Computer Education Techniques, Inc. $# Number of arguments passed to a script. $@ Holds the arguments; unlike $* it has the capability for separating the arguments. $* Holds
More informationDEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING UNIT I
DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING Year and Semester : II / IV Subject Code : CS6401 Subject Name : Operating System Degree and Branch : B.E CSE UNIT I 1. Define system process 2. What is an
More information